With a car driving for you will it be safer than driving for yourself? Or are you opening yourself to different, dangerous possibilities.

As more than 800 engineers, software developers, transportation experts and other technical folks met last week in this Detroit suburb to discuss the risks and benefits of autonomous and connected vehicles, they were raising more questions than finding answers.

Here are six unsolved challenges that stand between the technologies’ potential and reality:

Cybersecurity and privacy protection. Maybe this can’t be solved until there are thousands of pilot vehicles on our roads, but last week Wired magazine writer Andy Greenberg wrote about two cybersecurity experts who accessed a newer Jeep Cherokee’s computer brain through its Uconnect infotainment system and rewrote the firmware to plant their malicious code. The result: hip-hop began blasting through the stereo system, the AC turned to maximum force. Then the hacker’s code killed the transmission and brakes. We know autonomous cars will have even more software coding. One major attack and consumer confidence in the technology could be severely damaged.

How much will these vehicles cost? Established automakers are introducing progressively more advanced autonomous features in their most expensive models. Ride-hailing or other fleet-based services such as Uber or Lyft will try to deliver their service at a lower price than competing options.